Rename launcher.tutorial.tab to launcher.tutorial.tabs

As plural fits better. As this changes many files, it is a separate 
commit.

app/src/main/java/com/finnmglas/launcher/tutorial/TutorialActivity.kt

@@ -10,7 +10,7 @@ import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentPagerAdapter
 import androidx.viewpager.widget.ViewPager
 import com.finnmglas.launcher.*
-import com.finnmglas.launcher.tutorial.tab.*
+import com.finnmglas.launcher.tutorial.tabs.*
 import com.google.android.material.tabs.TabLayout
 import kotlinx.android.synthetic.main.tutorial.*
 

app/src/main/java/com/finnmglas/launcher/tutorial/tabs/TutorialFragmentConcept.kt

@@ -1,4 +1,4 @@
-package com.finnmglas.launcher.tutorial.tab
+package com.finnmglas.launcher.tutorial.tabs
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment

app/src/main/java/com/finnmglas/launcher/tutorial/tabs/TutorialFragmentFinish.kt

@@ -1,4 +1,4 @@
-package com.finnmglas.launcher.tutorial.tab
+package com.finnmglas.launcher.tutorial.tabs
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment

app/src/main/java/com/finnmglas/launcher/tutorial/tabs/TutorialFragmentSetup.kt

@@ -1,4 +1,4 @@
-package com.finnmglas.launcher.tutorial.tab
+package com.finnmglas.launcher.tutorial.tabs
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment

app/src/main/java/com/finnmglas/launcher/tutorial/tabs/TutorialFragmentStart.kt

@@ -1,4 +1,4 @@
-package com.finnmglas.launcher.tutorial.tab
+package com.finnmglas.launcher.tutorial.tabs
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment

app/src/main/java/com/finnmglas/launcher/tutorial/tabs/TutorialFragmentUsage.kt

@@ -1,4 +1,4 @@
-package com.finnmglas.launcher.tutorial.tab
+package com.finnmglas.launcher.tutorial.tabs
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment

app/src/main/res/layout/tutorial_concept.xml

@@ -9,7 +9,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentConcept">
+    tools:context=".tutorial.tabs.TutorialFragmentConcept">
 
     <TextView
         android:id="@+id/tutorial_concept_title"

app/src/main/res/layout/tutorial_finish.xml

@@ -10,7 +10,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentFinish">
+    tools:context=".tutorial.tabs.TutorialFragmentFinish">
 
     <TextView
         android:id="@+id/tutorial_finish_title"

app/src/main/res/layout/tutorial_setup.xml

@@ -9,7 +9,7 @@
     android:background="?attr/colorPrimary"
     android:paddingLeft="32sp"
     android:paddingRight="32sp"
-    tools:context=".tutorial.tab.TutorialFragmentSetup">
+    tools:context=".tutorial.tabs.TutorialFragmentSetup">
 
     <TextView
         android:id="@+id/tutorial_setup_title"

app/src/main/res/layout/tutorial_start.xml

@@ -9,7 +9,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentStart">
+    tools:context=".tutorial.tabs.TutorialFragmentStart">
 
     <com.finnmglas.launcher.libraries.FontAwesome
         android:id="@+id/tutorial_start_icon_right_2"

app/src/main/res/layout/tutorial_usage.xml

@@ -8,7 +8,7 @@
     android:background="?attr/colorPrimary"
     android:paddingLeft="32sp"
     android:paddingRight="32sp"
-    tools:context=".tutorial.tab.TutorialFragmentUsage">
+    tools:context=".tutorial.tabs.TutorialFragmentUsage">
 
     <TextView
         android:id="@+id/tutorial_usage_title"